]>
Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
01127f1e CB |
2 | /* |
3 | * Copyright 2015, Cyril Bur, IBM Corp. | |
4 | * | |
01127f1e CB |
5 | * This test attempts to see if the VMX registers change across a syscall (fork). |
6 | */ | |
7 | ||
8 | #include <altivec.h> | |
9 | #include <stdio.h> | |
10 | #include <unistd.h> | |
11 | #include <sys/syscall.h> | |
12 | #include <sys/time.h> | |
13 | #include <stdlib.h> | |
14 | #include <sys/types.h> | |
15 | #include <sys/wait.h> | |
16 | #include "utils.h" | |
17 | ||
18 | vector int varray[] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10,11,12}, | |
19 | {13,14,15,16},{17,18,19,20},{21,22,23,24}, | |
20 | {25,26,27,28},{29,30,31,32},{33,34,35,36}, | |
21 | {37,38,39,40},{41,42,43,44},{45,46,47,48}}; | |
22 | ||
23 | extern int test_vmx(vector int *varray, pid_t *pid); | |
24 | ||
25 | int vmx_syscall(void) | |
26 | { | |
27 | pid_t fork_pid; | |
28 | int i; | |
29 | int ret; | |
30 | int child_ret; | |
31 | for (i = 0; i < 1000; i++) { | |
32 | /* test_vmx will fork() */ | |
33 | ret = test_vmx(varray, &fork_pid); | |
34 | if (fork_pid == -1) | |
35 | return -1; | |
36 | if (fork_pid == 0) | |
37 | exit(ret); | |
38 | waitpid(fork_pid, &child_ret, 0); | |
39 | if (ret || child_ret) | |
40 | return 1; | |
41 | } | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
46 | int test_vmx_syscall(void) | |
47 | { | |
48 | /* | |
49 | * Setup an environment with much context switching | |
50 | */ | |
51 | pid_t pid2; | |
52 | pid_t pid = fork(); | |
53 | int ret; | |
54 | int child_ret; | |
55 | FAIL_IF(pid == -1); | |
56 | ||
57 | pid2 = fork(); | |
58 | ret = vmx_syscall(); | |
59 | /* Can't FAIL_IF(pid2 == -1); because we've already forked */ | |
60 | if (pid2 == -1) { | |
61 | /* | |
62 | * Couldn't fork, ensure child_ret is set and is a fail | |
63 | */ | |
64 | ret = child_ret = 1; | |
65 | } else { | |
66 | if (pid2) | |
67 | waitpid(pid2, &child_ret, 0); | |
68 | else | |
69 | exit(ret); | |
70 | } | |
71 | ||
72 | ret |= child_ret; | |
73 | ||
74 | if (pid) | |
75 | waitpid(pid, &child_ret, 0); | |
76 | else | |
77 | exit(ret); | |
78 | ||
79 | FAIL_IF(ret || child_ret); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | int main(int argc, char *argv[]) | |
84 | { | |
85 | return test_harness(test_vmx_syscall, "vmx_syscall"); | |
86 | ||
87 | } |